1. Notwithstanding any provision of sections 408.140, 408.233, 408.300, or any other law to the contrary, no provision of such sections shall be construed to prohibit the sale of a deficiency waiver addendum, guaranteed asset protection, or a similar product purchased as part of a loan transaction with collateral and at the borrower’s consent, provided the cost of the product is reasonable and is disclosed in the loan contract. The borrower’s consent to the purchase of the deficiency waiver addendum, guaranteed asset protection, or a similar product shall be in writing and acknowledge receipt of the required disclosures by the borrower. The creditor shall retain a copy for the file.

2. Each deficiency waiver addendum, guaranteed asset protection, or other similar product shall provide that in the event of termination of the product prior to the scheduled maturity date of the indebtedness, any refund of an amount paid by the debtor for such product shall be paid or credited promptly to the person entitled thereto; provided, however, that no refund of less than one dollar need be made. The formula to be used in computing the refund shall be the pro rata method.

3. Any debtor may cancel a deficiency waiver addendum, guaranteed asset protection, or other similar product within fifteen days of its purchase and shall receive a complete refund or credit of premium. This right shall be set forth in the loan contract, or by separate written disclosure. This right shall be disclosed at the time the debt is incurred in ten-point type and in a manner reasonably calculated to inform the debtor of this right.